//part1:C02:ep2.6.2:ep2.6.2.cpp
#include <iostream>
#include <string>
#include "Sales_item.h"
int main(void)
{
    Sales_item data1, data2;
    double price = 0;
    std::cin >> data1.bookNo >> data1.units_sold >> price;
    data1.revenue = data1.units_sold * price;
    
    return 0;
}